package lab02.test36;

/**
 * Created by lenovo on 2017/11/9.
 */
public class Undergraduate extends Student {
    @Override
    String calgrde() {
        //得到该生的平均成绩
        double avg=calAverage();
        if (avg>=80 && avg<=100)
            grade ="优秀";
        else if (avg>=70 && avg<80)
            grade="良好";
        else if (avg>=60 && avg<70)
            grade="一般";
        else if (avg>=50 && avg <60)
            grade="及格";
        else
            grade="不及格";
        return grade;
    }
}
